Topic 3

M. Hafner, Isabelle Azevedo, C. Marcantonini, J. Glachant, C. Hirschhausen, P. Capros, L. Meeus
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引用次数: 2

Abstract

INTRODUCTION: Systematic errors of up to 20mm and more have been reported in determining the center of pressure (COP) with force plates [1]. Experimentally these errors are determined by applying a point load to the force plate at a defined point and comparing the true coordinates of this point with the coordinates calculated from the signals of the force plate. The correction formulas given in the literature use polynomial approximations based on these measurements [4]. From analytical models it is known that the errors are due to the statically overdetermined configuration [3]. In this paper it will be shown that only with certain restrictions can these correction formulas be applied to distributed loads. The general construction of a force plate consists of a stiff plate resting on four posts (Fig. 1). In each of the four posts (i=1...4) there are tri-axial force transducers measuring compressive and tensile forces Fi z , in the z direction, as well as shearing forces Fi x , and Fi y , in the x and y directions respectively. From these
话题3
导读:用测力板测定压力中心(COP)的系统误差可达20mm以上[1]。在实验上,这些误差是通过在指定的点上对力板施加点载荷并将该点的真实坐标与从力板信号计算的坐标进行比较来确定的。文献中给出的校正公式使用基于这些测量的多项式近似[4]。从分析模型可知,误差是由静态超定配置引起的[3]。本文将证明,只有在一定的限制条件下,这些修正公式才能适用于分布荷载。力板的一般结构包括一个刚性板,它位于四个柱子上(图1)。在四个柱子(i=1…4)的每一个柱子上都有三轴力传感器,分别测量z方向的压缩力和拉力Fi z,以及x和y方向的剪切力Fi x和Fi y。从这些
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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